package com.hmdp.utils;

import org.springframework.data.redis.core.StringRedisTemplate;
import org.springframework.stereotype.Component;

import javax.annotation.Resource;
import java.time.LocalDateTime;
import java.time.ZoneOffset;
import java.time.format.DateTimeFormatter;
@Component
public class RedisIdWorker {
    //开始时间戳
    private static final long BEGIN_TIMESTAMP = 1640995200L;
    //序列号位数
    private static final int COUNT_BITS = 32;
    @Resource
    private StringRedisTemplate stringRedisTemplate;
    public long nextId(String keyPrefix) {
        LocalDateTime now = LocalDateTime.now();
        long nowSeconds = now.toEpochSecond(ZoneOffset.UTC);
        long timestamp = nowSeconds - BEGIN_TIMESTAMP;
        String date=now.format(DateTimeFormatter.ofPattern("yyyy:MM:dd"));
        long count=stringRedisTemplate.opsForValue().increment("icr:"+keyPrefix+date);
        return (timestamp<<COUNT_BITS)|count;
    }
}
